Safety razor and blade



April 28, 1942. R. DE s'." NAVA SAFETY RAZOR AND BLADE Filed Feb. 9, 1939M Patented pr. 2.8, 1942 SAFETY RAZOR ANDBLADE Robert De Silva Nava, San Luis Potosi, Mexico, assigner to Juan Martinez Lopez, San Luis Potosi, Mexico Application February 9, 1939, Serial No. 255,385

2 Claims. (Cl.` 30-66) This invention relates to a safety razor and more` particularly to a safety razor and an improved blade together with a holder for extra blades provided in the razor blade handle. The

improved safety razor is of simplified and improved form, including a minimum of parts, and eliminating the use of a detachable handle and retaining screws for fastening the parts together.

It is an object of this invention to provide an improved type of safety razor employing a comparatively narrow double edged blade of convex form adapted to be held in a cutting position by means of a slidable friction cap which, when in position, is engaged by the spring-like convex blade which assists in holding the cap in position. i It is also an object of this invention to provide an. improved type of safety razor adapted to use comparatively narrow blades, which on account of `their size are adapted to be readily carried in a recess provided in the handle of the razor.

It is a further object of this invention to provide an improved and simplified form of safety razor wherein a friction cap is used to hold a convex cutting blade in positionl on the razor head. l

It is furthermore an object of `this invention to provide an improved type of safety razor wherein the handle is integrally formed or rigidly secured on the razor head and wherein a retaining cap is engageable on the razor head by wedge-like l mechanism, with said cap when in position acting to compressa convex cutting blade.

It is an important object of this invention to provide an improved type of combination safety razor and blade, of simplied and inexpensive construction, wherein the blade is double edged and comparatively narrow and `of i concave-convex shape, permitting a plurality of the improved blades to be carried in a storage pocket within the razor handle, said razor including a slidable retaining cap adapted to be retained in position by wedge-like means allowing the cap to engage and compress one of the concave-convex blades in a suitable cutting position adjacent a straight guard strip and above a suitable escape groove in the razor head.

Other and further important objects of this invention will be apparent from the disclosures in the specification and the accompanying drawing.

The invention (in a preferred form) is illustrated in the drawing and hereinafter more fully described.

On the drawing: Figure 1 is an enlarged side elevation of a safety 'razor embodying the principles of this invention, with parts of the handle broken away and shown in section, and disclosing a storage compartment for extra razor blades;

Figure 2 is an enlarged top plan view Vof the razor, showing a blade in position for use;

Figure 3 is a fragmentary top plan View of the razor with the retaining cap removed and the blade partly broken away;

Figure 4 is a sectional detailed View taken on line IV-IV of Figure 2;

Figure 5` is an enlarged fragmentary detailed section taken on line V-V `of Figure 2;

Figure 6 is a plan view of one of the razor blades; and

`Figure '7 is an enlarged transverse detailed section taken on lineVlI-VII of Figure 6, showing the curved or convexed shape of the blade. As shown on the drawing: f The reference numeral l indicates a razor handle, the outer end of which is provided with a recess or storage chamber 2 for the reception of an extra supply of razor blades, which may come in a package 3. The new blades may, of course,` come individually wrapped for storage inv the chamber 2. It will,` of course, .be understood that the chamber 2 may also be used for the reception of old or used blades. As clearlyl illustrated in Figure 1, the outer end of the handle I is threaded for the removable reception of` an internally threaded closure cap 4 which contains a gasket or washer 5 to seat against the end of the handle l to form a watertight t for the cap 4.

Integrally formed on the second end of the handle I is a handle extension 6 having integrally 4formed on the end thereof an inclined head 1, the lower or front portion of which is Athicker than the .upper or rear portion, as` clearly illustrated in Figure 5. A receiving groove 8 is provided across the top of the front portion of the razor head 1. Leading from the groove B are a plurality of discharge or drain openings or passages 9, which are of conical or tapered shape and open through the bottom of the head 1, as clearly shown in Figure 5. Formed along the front portion of the head '1, adjacent the front edge of the groove 8, is a blade guard strip I0. Integrally formed on each end of the razor head 1 is a tapered guide strip or wedge extension H.

For the purpose of accurately holding a razor blade in position on the top of the front portion of the razor head 1, a pair of oppositely positioned tapered centering lugs or pins l2 are integrally formed on the head, with the tapered ends of said pins directed toward one another, as clearly il,

curved or of concavo-convex form, permitting the blade when in position to seat upon the top surface of the razor head 'I with a spring-like action between the tapered centering studs or pins I2, as 4clearly shown in FiguresB and 5 with the front cutting edge of the positioned razor blade' projecting over the groove 8 leaving a hair receiving slot between the front edge of the razor blade and the straight guard edge I of the head 1.

For the purpose of releasably clamping a curved razor blade I4 in position upon the razor head 7, aslidable friction-fit type of `retaining cap or guard cover is provided. The retaining cap or guard cover comprises a top I6 and two integral sides I1, the inner side of each of which is provided with a tapered groove or wedge slot I8 adapted to frictionally or wedgingly engage over the wedge strips II formed on the sides of the razor head 1. As clearlyillustrated in Figure 5, the inner surface of the top I6 of the cap or cover section is inclined, thereby providing a tapered top, the inner front end of which may convenientlyslide over the convex surface of a razor blade I4 to flatten or compress the razor blade into proper position for use and at the same time permitting the spring-like action of the blade to actv against the cover` I to assist in retaining the cover in place. As clearly illustrated in Figures 1 and 2, knurled or serrated portions I9 are provided on the outer surfaces of the end walls I'I of the cap or cover section to facilitate gripping of the cap or cover section when the same is being pushed into position or pulled off of the head of the razor.

It will be noted that the razor blades are cornparatively narrow, thereby requiring, very little material in the construction thereof when compared with the usual flat wide types of razor blades heretofore in use. The improved curved or concavo-c'onvex razor blades. I4 may be conveniently covered with oil or grease, and a pluralityth-ereof may be packaged by placing a required number one against the other separated by the covering. A package of said blades, such as shown at 3 in Figure 1 of the drawing, may be conveniently carried in the storage chamber 2 of ythe, handle l,

. It will'be noted that in the present case the convexed or curved razor blades, when mounted in position on the head 1, are adapted to be compressed or attened out by the inclined inner surface of the wedge top I6 of the cap or cover section instead of being curved or deflected from a straight position between screw controlled clamping sections of the ordinary types of safety razors heretofore in common use.

It will, of course, be understood that various details of construction may be varied through a wide range without departing from the principles of this invention, and it is therefore not the purpose to limit the patent granted hereon otherwise than necessitated by the scope of the appended claims.

I claim as my invention:

1. A safety razor for use with a resilient concavo-convex blade, said razor including a wedgeshaped head having means dening a guard at its forward edge and decreasing in thickness from the guard edge to the rear edge and presenting a flat seat for a blade, said head being provided with integrally formed and tapered guide extensions, a cap having side wings slidable along said extensions and guidedly retained thereby in relation to said head, said cap including a wedgeshaped clamping plate integral with said wings and increasing in thickness from its forward edge to its rear edge and presenting a flat face in opposed and spaced relation to said seat, said side Wings and said extensions being cocperable to effect clamping movement of said clamping plate towards said seat as said cap is pushed forwardly on said head'whereby the forward por-A vtion of said plate is adapted progressively to engage said blade with an ironing movement and being cocperable with the resilient blade under the forward portion of said plate to retain said capA and said head in assembled relation in use. A2. A razor comprising a head presenting a substantially fiat seat for a razor blade, aresilient concavo-convex blade on said seat with its convex face uppermost, a cap having side wings engaging said head and retained thereby for sliding movement of said cap along said head, said cap including a clamping plate integral with said wings and presenting a substantially iiat face in opposed spaced relation to said seat, said head and said side wings engaging inclined surfaces arranged cooperable to effect clamping movement of said clamping plate towards said seat as said cap is pushed forwardly on said head whereby said plate progressively ,engages said blade with an ironing movement, vsaid resilient blade being cocperable with said cap and said seat to retain said `cap and said blade in assembled relation in use.

ROBERT DE SILVA NAVA. 

